CotA: Reincarnated as the most powerful Farmer

Full Title.
CotA: Reincarnated in another world I use my farming magic to become the strongest. Isekai tensei shita ore wa nōkō mahō o kushi shite saikyō ni naru.
Meke reincarnates into the life of a newborn baby as the youngest son to the baron. He learns of his farming powers and his earth and nature magic to build a new land, city, and empire from the ground up. Being hated and ostracized he gains enough power and respect to become the lord of the land, to conquer all other lands, and to even become a vassal to the emperor himself. He may be a weak farming mage, but he is able to attain true power and a purpose to become the best at what he does, farming.